in Quercus, phellogen develops from

Options

A. Epidermis
B. Hypodermis
C. outer cortex
D. pericycle

Answer

To answer the question "In Quercus, phellogen develops from," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: Recognize that Quercus refers to the oak tree. Understanding the common name helps contextualize the question.

2. **Define Phellogen**: Understand that phellogen is also known as cork cambium. It is a layer of meristematic tissue that is responsible for the production of cork (the outer bark) during secondary growth.

3. **Understand the Function of Phellogen**: Phellogen plays a crucial role in the secondary growth of the plant, contributing to the thickening of the plant body.

4. **Locate Phellogen in the Plant Structure**: Phellogen is located beneath the epidermis of the plant. This positioning is important as it indicates where it develops from.

5. **Analyze the Options**: The options provided are:
- Epidermis
- Hypodermis
- Outer cortex
- Pericycle

6. **Determine the Correct Answer**: Since phellogen is located beneath the epidermis and develops from it, the correct answer is that phellogen develops from the epidermis.

### Final Answer:
In Quercus, phellogen develops from the epidermis.

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